1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b71fd695d18ea0cbd85f1874866464ea414c92a536968a75a892b20baa5e4b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d260abc-969f-4aea-98bd-accc2357046d.json and https://artists.proofprofile.net/proofs/artist/2d260abc-969f-4aea-98bd-accc2357046d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889bc49b2034624c1b8bb200a40d4b12cc6db3be9b1984be0e10ecf2e7910eb5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f7d97e4b8839be9948d1f02a40c40deaa5cb9b0d084ea7077db95ee7f69905. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fcdb6b58d66b84bbf083b1c1f8f911a3e4763dd4347cceca939e1745b5c2ad. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf01ef89c7e422070569d1b09001ce328c12bc01b0a02a19bee62e81ee53f00. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889bc49b2034624c1b8bb200a40d4b12cc6db3be9b1984be0e10ecf2e7910eb5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f7d97e4b8839be9948d1f02a40c40deaa5cb9b0d084ea7077db95ee7f69905. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf01ef89c7e422070569d1b09001ce328c12bc01b0a02a19bee62e81ee53f00. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826d1e0b942935fffe1d77200d2dadd38d644e5e598a49f35a1ca5c909078b27. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcaaf0c90b82c7a411c402c03763bcbca58a4836d4e5d834252e89b135b6414. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCMCO2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb032cf3cb1e42fbebc96ff1a04d3a21772f92875eacc50e6863821c4a0884c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd4c4b7324f7231092edae8e348914dd2a265437d12b41451e31cfb22a0f0a5. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:31:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee3732cce4c20483a8cc3c35047cfb378147d3caf4282e4298555ead99c6c93. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALVP2480523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63ed7a2cbe23c1c87d648022e8643c03eaba2c6c2d445fbc3d15b5d8c5767ff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d93d3cee7662b085a9f59e37d819f3cd13a42a2cca48c70645dbb8eb9b06d6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afff271c721067d6b9b317e40d004c1a5164cf8928aeb2e7414f0340dd4990e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c11e71806b0c611a76b93b85f81f4a9311dd79e107a56c2ba6026913aa4eac8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e8ae5b6e5dcada949af137c01147d727c02153ac19f042ce1bad105bda0c17. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CBF8B2443366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdfa571b4d077ef31f89f83537521318753bc4f210be4a5da67abbf50256f0e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3908f234b2fd0b7dce0f92cd8f4ad18b265b5d133c920be95f2b7a38e4c882cd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a788fe42824ef215dfa769dbbb794002573a3287929c91e18c57aa12f2621d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35562b87f481877a34264127e95b4b08cc2d8b4747ea3c3f9d2444bd58db8ccd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1000f517ca87817b53771515c0d443317e356f5be1aad9bdc48754f42bf54ffd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac89c97df54874cf351e64c4bef4d6dca81e02e5e2667113750aa2132707805. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCPGC2400006.